3 # Test for qcow2 bitmap printed information
5 # Copyright (c) 2019 Virtuozzo International GmbH
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 2 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
23 from iotests
import qemu_img_create
, qemu_io
, qemu_img_pipe
, \
24 file_path
, img_info_log
, log
, filter_qemu_io
26 iotests
.verify_image_format(supported_fmts
=['qcow2'])
28 disk
= file_path('disk')
30 bitmap_flag_unknown
= 1 << 2
31 # flag_offset = 5*cluster_size + flag_offset_in_bitmap_directory_entry
35 def print_bitmap(extra_args
):
36 log('qemu-img info dump:\n')
37 img_info_log(disk
, extra_args
=extra_args
)
38 result
= json
.loads(qemu_img_pipe('info', '--force-share',
39 '--output=json', disk
))
40 if 'bitmaps' in result
['format-specific']['data']:
41 bitmaps
= result
['format-specific']['data']['bitmaps']
42 log('The same bitmaps in JSON format:')
43 log(bitmaps
, indent
=2)
45 log('No bitmap in JSON format output')
48 def add_bitmap(bitmap_number
, persistent
, disabled
):
49 granularity
= 1 << (13 + bitmap_number
)
50 bitmap_name
= 'bitmap-' + str(bitmap_number
-1)
51 vm
= iotests
.VM().add_drive(disk
)
53 vm
.qmp_log('block-dirty-bitmap-add', node
='drive0', name
=bitmap_name
,
54 granularity
=granularity
, persistent
=persistent
,
59 def write_to_disk(offset
, size
):
60 write
= 'write {} {}'.format(offset
, size
)
61 log(qemu_io('-c', write
, disk
), filters
=[filter_qemu_io
])
64 def toggle_flag(offset
):
65 with
open(disk
, "r+b") as f
:
68 toggled
= chr(ord(c
) ^ bitmap_flag_unknown
)
73 qemu_img_create('-f', iotests
.imgfmt
, disk
, '1M')
75 for num
in range(1, 4):
79 log('Test {}'.format(num
))
80 add_bitmap(num
, num
> 1, disabled
)
81 write_to_disk((num
-1) * chunk
, chunk
)
85 vm
= iotests
.VM().add_drive(disk
)
88 log('Test {}\nChecking "in-use" flag...'.format(num
))
89 print_bitmap(['--force-share'])
93 log('\nTest {}'.format(num
))
94 qemu_img_create('-f', iotests
.imgfmt
, disk
, '1M')
95 add_bitmap(1, True, False)
96 log('Write an unknown bitmap flag \'{}\' into a new QCOW2 image at offset {}'
97 .format(hex(bitmap_flag_unknown
), flag_offset
))
98 toggle_flag(flag_offset
)
100 toggle_flag(flag_offset
)
101 log('Unset the unknown bitmap flag \'{}\' in the bitmap directory entry:\n'
102 .format(hex(bitmap_flag_unknown
)))